Finding the Fourth Proportional to 28,300.72, 42,395.02 and 19,394.16

Step by Step Solution

1. Step 1: Write the proportion equation
   28,300.72 : 42,395.02 = 19,394.16 : x
2. Step 2: Convert to fraction form
   28,300.72/42,395.02 = 19,394.16/x
3. Step 3: Cross multiply
   28,300.72x = 42,395.02 × 19,394.16
4. Step 4: Simplify right side
   28,300.72x = 822,215,801.08
5. Step 5: Solve for x
   x = 822,215,801.08/28,300.72
6. Step 6: Final answer
   x = 29,052.82